Send him another email, I know he has been traveling, surprised he didn't get back to you, I asked him if there were any outstanding emails he hasn't answered and he said "no" Maybe it got caught in the spam filter. Either way, might be worth reaching out to him one more time. I am in no way saying that this isn't a great DIY project but some things you might want to think about when you make the decision between whether you should build or buy is that the ceramic heating element is still exposed to the vapor path, the glass used on the VHW is thicker and has more thermal mass to retain heat, there are 5 cyclones to Expedite the sequential, venturi effect (air speeds up to increase heat), and is only $100 bucks for the next month or so. He?s actually adding an impact resistant sleeve so that that you don?t get scalded from the glass and is more resistant to impact. The sleeve will not intefere with the all glass vapor path and will also act as a seal between the VHW and the bowl for better vapor extraction efficiency.